Abstract
The long growth defects often found in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} single crystals effectively weaken the geometrical barrier and lower the field of first flux penetration. This means that the intrinsic (bulk) magnetic properties can be more easily accessed using magnetic measurements. Thus, the onset of strong bulk flux pinning in the sample bulk is determined to lie at T {approximately} 40 K, independent of whether the field strength is above or below the field of the second peak in the magnetization.
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